Two-distance touch free automatic type water supply device and method

ABSTRACT

A two-distance touch free automatic type water supply method includes: when a sensor senses an appearance of an external object at a first distance from the sensor, the sensing signal is an open signal, whereby water of the outlet is supplied; when the sensor senses a disappearance of the external object at the first distance from the sensor, the sensing signal is a closed signal, whereby water of the outlet is not supplied; when the sensor senses a first appearance and a first disappearance of the external object at a second distance from the sensor, the sensing signal is an open signal, whereby water of the outlet is supplied; and when the sensor senses a second appearance and a second disappearance of the external object at the second distance from the sensor, the sensing signal is a closed signal, whereby water of the outlet is not supplied.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of Taiwan Patent Application No.103129835, filed on Aug. 29, 2014, which is hereby incorporated byreference for all purposes as if fully set forth herein.

BACKGROUND OF THE INVENTION

1. Field of Invention

The present disclosure relates to a two-distance touch free automatictype water supply device, and more particularly to a two-distance touchfree automatic type water supply device whose an electronic control unitincludes an only sensor, which can be a long distance mode sensor and ashort distance mode sensor simultaneously.

2. Related Art

Recently, a common faucet is provided with a rotational switch locatedthereon for controlling the faucet to supply water, whereby humans canwash their hand. During the actual use, a user first applies soap to hishand, and then turns on the rotational switch, whereby the faucet cansupply clean water to wash the hand so as to finish the washing step.After the washing step, two hands need to take water to wash the surfaceof the rotational switch sometimes, such that the soap cannot beattached on the rotational switch. But, it is inconvenient and is wastedin the water resource.

The above-mentioned faucet is a touch type faucet, and thus a touch freeautomatic type faucet is developed in order to avoid the problem thatthe touch type faucet is inconvenient and wasted in the water resource.

According to the touch free automatic type faucet, when a hand of a useris put at a position below an outlet, the touch free automatic typefaucet senses an appearance of the hand. Then, the touch free automatictype faucet is turn on, and the water flows through the outlet. When thehand of the user leaves the position below the outlet, the touch freeautomatic type faucet senses a disappearance of the hand. Then, thetouch free automatic type faucet is turn off, and the water cannot flowthrough the outlet.

However, when a great quantity of water is needed for a washing work,the hand of the user must be put at the position below the outlet allthe time, whereby the touch free automatic type faucet is turn on, andthe water flows through the outlet all the time so as to provide a greatquantity of water. It is inconvenient for the user.

Accordingly, a need remains for a two-distance touch free automatic typewater supply device to solve the foregoing problems.

SUMMARY OF THE INVENTION

The objective of the present disclosure is to provide a two-distancetouch free automatic type water supply device, whose an electroniccontrol unit includes an only sensor, which can be a long distance modesensor and a short distance mode sensor simultaneously.

To achieve the foregoing objective, the present disclosure provides atwo-distance touch free automatic type water supply device, including: ashell, an electronic control unit and a driving unit. The shell includesan inlet, a flow channel and an outlet, wherein the outlet iscommunicated with the inlet through the flow channel. The electroniccontrol unit includes: a sensor adjacent to the outlet for sensing anexternal object and then generating a sensing signal; and a controlcircuit electrically connected to the sensor and receiving the sensingsignal for generating a control signal. An end of the driving unit isdisposed in the shell, and the other end of the driving unit isphysically connected to the flow channel for automatically controllingwhether water of the outlet is supplied according to the control signal.When the sensor senses an appearance of an external object at a firstdistance from the sensor, the sensing signal is an open signal, wherebythe water of the outlet is supplied; when the sensor senses adisappearance of the external object at the first distance from thesensor, the sensing signal is a closed signal, whereby the water of theoutlet is not supplied; when the sensor senses a first appearance and afirst disappearance of the external object at a second distance from thesensor, the sensing signal is an open signal, whereby the water of theoutlet is supplied, wherein the first distance is different from thesecond distance; and when the sensor senses a second appearance and asecond disappearance of the external object at the second distance fromthe sensor, the sensing signal is a closed signal, whereby the water ofthe outlet is not supplied.

According to the two-distance touch free automatic type water supplydevice of the present disclosure, the electronic control unit includesan only sensor, which can be a long distance mode sensor and a shortdistance mode sensor simultaneously, wherein a long distance is thefirst distance, a short distance is the second distance, and the seconddistance is different from the first distance. Thus, the electroniccontrol unit doesn't need to include at least two sensors used to be thelong distance mode sensor and the short distance mode sensor, wherebythe number of elements of the electronic control unit can be decreased,the design of the electronic control unit can be simplified, and furtherthe cost of the two-distance touch free automatic type water supplydevice can be decreased

To make the aforementioned and other objects, features and advantages ofthe present disclosure clearer, detailed illustration is provided in thefollowing with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic plan view of a two-distance touch free automatictype water supply device according to the first embodiment of thepresent disclosure, showing that the two-distance touch free automatictype water supply device is installed to a wash basin.

FIG. 2 is a partially cross-sectional view of a shell of a two-distancetouch free automatic type water supply device according to the firstembodiment of the present disclosure.

FIG. 3 is a schematic view showing a long distance mode of atwo-distance touch free automatic type water supply method according toan embodiment of the present disclosure.

FIG. 4 is a schematic view showing a short distance mode of atwo-distance touch free automatic type water supply method according toan embodiment of the present disclosure.

FIG. 5 is a schematic plan view of a two-distance touch free automatictype water supply device according to the second embodiment of thepresent disclosure, showing that the two-distance touch free automatictype water supply device is installed to a wash basin.

FIG. 6 is a partially cross-sectional view of a shell of a two-distancetouch free automatic type water supply device according to the secondembodiment of the present disclosure.

FIG. 7 is an exploded perspective view of a valve core according to thesecond embodiment of the present disclosure.

FIGS. 8 a to 8 c are schematic views showing that a mark of the cold/hotrotary switch in a left direction, a middle direction and a rightdirection respectively according to the second embodiment of the presentdisclosure.

FIG. 9 is a perspective view of a two-distance touch free automatic typewater supply device according to the third embodiment of the presentdisclosure.

FIG. 10 is a partially cross-sectional view of a shell of a two-distancetouch free automatic type water supply device according to the thirdembodiment of the present disclosure.

FIG. 11 a schematic view showing that a two-distance touch freeautomatic type water supply device can be installed at a conventionaltouch type faucet according to the third embodiment of the presentdisclosure.

FIG. 12 is a schematic plan view of a two-distance touch free automatictype water supply device according to the fourth embodiment of thepresent disclosure, showing that the two-distance touch free automatictype water supply device is installed to a wash basin.

FIGS. 13 a and 13 b are partially cross-sectional views of a shell of atwo-distance touch free automatic type water supply device according tothe fourth embodiment of the present disclosure.

FIG. 14 is an exploded perspective view of a valve core according to thefourth embodiment of the present disclosure.

FIGS. 15 a to 15 c are schematic views showing that a mark of theautomatic/manual mode cold/hot rotary switch in a left direction, amiddle direction and a right direction respectively according to thefourth embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE INVENTION

The present disclosure will become more fully understood from thedetailed description given herein below and the accompanying drawingswhich are given for illustration only, and thus are not limitative ofthe present disclosure.

FIG. 1 is a schematic plan view of a two-distance touch free automatictype water supply device 100 according to the first embodiment of thepresent disclosure. The two-distance touch free automatic type watersupply device 100 is installed to a wash basin. FIG. 2 is a partiallycross-sectional view of a shell of a two-distance touch free automatictype water supply device 100 according to the first embodiment of thepresent disclosure. In this embodiment, the two-distance touch freeautomatic type water supply device 100 can be a touch free automatictype faucet. Referring to FIGS. 1 and 2, the two-distance touch freeautomatic type water supply device 100 includes a shell 110, anelectronic control unit 130 and a driving unit 140. The shell 110includes an inlet 112, a flow channel 114 and an outlet 116, wherein theoutlet 116 is communicated with the inlet 112 through the flow channel114.

Referring to FIG. 1 again, the electronic control unit 130 includes asensor 132 and a control circuit 134. The sensor 132 is adjacent to theoutlet 116. In this embodiment, the sensor 132 is disposed onto theshell 110 (e.g., the sensor 132 is mounted on the shell 110 or embeddedinto the shell 110). In another embodiment, the sensor 132 is disposedon the control circuit 134 and is exposed out from the shell 110. Thesensor 132 is adapted to sense an external object (e.g., a hand) andthen to generate a sensing signal. The sensor 132 can be an infraredsensor or a microwave sensor. The control circuit 134 is disposed in theshell 110, and is electrically connected to the sensor 132. The controlcircuit 134 receives the sensing signal, and then generates a controlsignal. For example, the control circuit 134 can include a semiconductorchip (not shown) for receiving the sensing signal, and then generatingthe control signal.

Referring to FIG. 2 again, an end of the driving unit 140 is disposed inthe shell 110, and the other end of the driving unit 140 is physicallyconnected to the flow channel 114 for automatically controlling whetherthe water of the outlet 116 is supplied according to the control signal.The driving unit 140 can be a solenoid valve. An electrical cord (notshown) passes through the water basin. A power source, e.g., a drybattery (not shown), is disposed below the shell 110 for providingelectrical power to the electronic control circuit 130 and the drivingunit 140 through the electric cord.

Referring to FIG. 3, it depicts a long distance mode of a two-distancetouch free automatic type water supply method according to an embodimentof the present disclosure. When the sensor 132 senses an appearance ofan external object at the first distance D1 from the sensor 132, thesensing signal is an open signal whereby the water of the outlet 116 issupplied; and when the sensor 132 senses a disappearance of the externalobject at the first distance D1 from the sensor 132, the sensing signalis a closed signal, whereby the water of the outlet 116 is not supplied.The first distance D1 can be set from 10 to 15 centimeters. Preferably,the first distance D1 can be set from 12 to 15 centimeters. The longdistance mode can provides a suitable quantity of water for washing thehand, but the external object (e.g., the hand) needs to appear at theposition being far slightly from the outlet 116 all the time.

For example, when the hand of the user appears at the position being farslightly from the outlet 116 (e.g., the position at the first distanceD1 from the sensor 132), the sensor 132 senses an appearance of thehand, and the sensing signal is an open signal. The control circuit 134receives the sensing signal, and then generates a control signal. Then,the driving unit 140 opens the outlet 116 according to the controlsignal, and the water flows through the outlet 116. When the hand of theuser disappears at the position being far slightly from the outlet 116(e.g., the position at the first distance D1 from the sensor 132), thesensor 132 senses a disappearance of the hand, and the sensing signal isa closed signal. The control circuit 134 receives the sensing signal,and then generates a control signal. Then, the driving unit 140 closesthe outlet 116 according to the control signal, and the water doesn'tflow through the outlet 116.

Referring to FIG. 4, it depicts a short distance mode of a two-distancetouch free automatic type water supply method according to an embodimentof the present disclosure. When the sensor 132 senses a first appearanceand a first disappearance of an external object at a second distance D2from the sensor 132, the sensing signal is an open signal, whereby thewater of the outlet 116 is supplied; and when the sensor 132 senses asecond appearance and a second disappearance of the external object atthe second distance D2 from the sensor 132, the sensing signal is aclosed signal, whereby the water of the outlet 116 is not supplied. Thesecond distance D2 can be set from 2 to 8 centimeters. Preferably, thesecond distance D2 can be set from 2 to 3 centimeters. The shortdistance mode can continuously supply the water for providing a greatquantity of water, but the external object (e.g., the hand) doesn't needto appear at the position being near slightly from the outlet 116 allthe time.

For example, when the hand of the user appears and disappears at theposition being near slightly from the outlet 116 (e.g., the position atthe second distance D2 from the sensor 132) for the first time, thesensor 132 senses the first appearance and the first disappearance ofthe hand, and the sensing signal is an open signal. The control circuit134 receives the sensing signal, and then generates a control signal.Then, the driving unit 140 opens the outlet 116 according to the controlsignal, and the water continuously flows through the outlet 116. Whenthe hand of the user appears and disappears the position being nearslightly from the outlet 116 (e.g., the position at the second distanceD2 from the sensor 132) for the second time, the sensor 132 senses thesecond appearance and the second disappearance of the hand, and thesensing signal is a closed signal. The control circuit 134 receives thesensing signal, and then generates a control signal. Then, the drivingunit 140 closes the outlet 116 according to the control signal, and thewater doesn't flow through the outlet 116.

The above-mentioned corresponding steps of the long distance mode andthe short distance mode of the two-distance touch free automatic typewater supply method of the present disclosure are not desired to limitthe present disclosure. According to the two-distance touch freeautomatic type water supply method in another embodiment, thecorresponding steps of the long distance mode and the short distancemode can be interchanged to each other. For example, according to ashort distance mode, when the sensor 132 senses an appearance of anexternal object at the second distance D2 from the sensor 132, thesensing signal is an open signal so as to switch on the water supply ofthe outlet 116; and when the sensor 132 senses a disappearance of theexternal object at the second distance D2 from the sensor 132, thesensing signal is a closed signal so as to switch off the water supplyof the outlet 116. The second distance D2 can be set from 2 to 8centimeters. According to a long distance mode, when the sensor 132senses a first appearance and a first disappearance of an externalobject at the first distance D1 from the sensor 132 (the first distanceD1 is longer than the second distance D2), the sensing signal is an opensignal so as to switch on the water supply of the outlet 116; and whenthe sensor 132 senses a second appearance and a second disappearance ofthe external object at the first distance D1 from the sensor 132, thesensing signal is a closed signal so as to switch off the water supplyof the outlet 116. The first distance D1 can be set from 10 to 15centimeters

According to the two-distance touch free automatic type water supplydevice of the present disclosure, the electronic control unit includesan only sensor, which can be a long distance mode sensor and a shortdistance mode sensor simultaneously, wherein a long distance is thefirst distance, a short distance is the second distance, and the seconddistance is different from the first distance. Thus, the electroniccontrol unit doesn't need to include at least two sensors used to be thelong distance mode sensor and the short distance mode sensor, wherebythe number of elements of the electronic control unit can be decreased,the design of the electronic control unit can be simplified, and furtherthe cost of the two-distance touch free automatic type water supplydevice can be decreased.

FIG. 5 is a schematic plan view of a two-distance touch free automatictype water supply device 200 according to the second embodiment of thepresent disclosure. The two-distance touch free automatic type watersupply device 200 is installed to a wash basin. FIG. 6 is a partiallycross-sectional view of a shell of a two-distance touch free automatictype water supply device 200 according to the second embodiment of thepresent disclosure. In this embodiment, the two-distance touch freeautomatic type water supply device 200 can be a touch free automatictype faucet for mixing cold water and hot water. Referring to FIGS. 5and 6, the two-distance touch free automatic type water supply device200 includes a shell 210, an electronic control unit 230 and a drivingunit 240. The electronic control unit 230 includes a sensor 232 and acontrol circuit 234. The shell 210 includes an inlet 212, a flow channel214 and an outlet 216, wherein the outlet 216 is communicated with theinlet 212 through the flow channel 214. The inlet 212 includes a coldwater pipe 222 and a hot water pipe 224.

The two-distance touch free automatic type water supply device 200 inthe second embodiment is similar to the two-distance touch freeautomatic type water supply device 100 in the first embodiment, and thesimilar elements have been designated by similar reference numbers. Thedifference between the two-distance touch free automatic type watersupply devices 200, 100 in the second and first embodiments is that: thetwo-distance touch free automatic type water supply device 200 furtherincludes a cold/hot rotary switch 250 and a valve core 260, as shown inFIG. 6. The cold/hot rotary switch 250 is adapted to set whether thewater supply of the outlet 216 is hot water, warm water or cold water.An end of the valve core 260 is physically connected to the cold/hotrotary switch 250, and the other end of the valve core 260 is physicallyconnected to the inlet 212 for controlling a mixture ratio of cold waterto hot water of the inlet 212.

Referring to FIGS. 7 and 6, the valve core 260 includes a control rod262 and a throttling plate 264. One end of the control rod 262 ismechanically connected to the cold/hot rotary switch 250. The throttlingplate 264 is physically connected to the other end of the control rod262, and includes two through apertures 266, which are corresponding tothe cold water pipe 222 and the hot water pipe 224 of the inlet 212respectively, whereby when the cold/hot rotary switch 250 drives thecontrol rod 262 and further rotates the throttling plate 264, anoverlapping area between one of the two through apertures 266 and thecold water pipe 222 and an overlapping area between the other one of thetwo through apertures 266 and the hot water pipe 224 can be adjusted. Alower portion of the control rod 262 includes a chamber 267, which has aside aperture 268. When the two through apertures 266 are overlappedwith the cold water pipe 222 and the hot water pipe 224 of the inlet 212respectively, the side apertures 268 is overlapped with the flow channel214 correspondingly.

When a user rotates a mark 252 of the cold/hot rotary switch 250 in aleft direction (shown in FIG. 8 a), a middle direction (shown in FIG. 8b) or a right direction (shown in FIG. 8 c), whereby the water supply ofthe outlet 216 can be set to the hot water (H), the warm water (W) orthe cold water (C). After the water supply of the outlet 216 can be setto the hot water (H), the warm water (W) or the cold water (C), the longdistance mode of the two-distance touch free automatic type water supplymethod of the present disclosure can provides a suitable quantity of hotwater, warm water or cold water for washing the hand, but the hand needsto appear at the position being far slightly from the outlet 216 all thetime. The short distance mode of the two-distance touch free automatictype water supply method of the present disclosure can continuouslysupply the water for providing a great quantity of hot water, warm wateror cold water, but the hand doesn't need to appear at the position beingnear slightly from the outlet 216 all the time.

FIG. 9 is a perspective view of a two-distance touch free automatic typewater supply device 300 according to the third embodiment of the presentdisclosure. FIG. 10 is a partially cross-sectional view of a shell 310of a two-distance touch free automatic type water supply device 300according to the third embodiment of the present disclosure. Referringto FIGS. 9 and 10, the two-distance touch free automatic type watersupply device 300 includes a shell 310, an electronic control unit 330and a driving unit 340. The electronic control unit 330 includes asensor 332 and a control circuit 334. The shell 310 includes an inlet312, a flow channel 314 and an outlet 316, wherein the outlet 316 iscommunicated with the inlet 312 through the flow channel 314.

The two-distance touch free automatic type water supply device 300 inthe third embodiment is similar to the two-distance touch free automatictype water supply device 100 in the first embodiment, and the similarelements have been designated by similar reference numbers. Thedifference between the two-distance touch free automatic type watersupply devices 300, 100 in the third and first embodiments is that: thetwo-distance touch free automatic type water supply device 300 can beinstalled at a conventional touch type faucet 302, shown in FIG. 11. Theinlet 312 of the two-distance touch free automatic type water supplydevice 300 is communicated with an outlet 304 of the conventional touchtype faucet 302.

After a user installs the two-distance touch free automatic type watersupply device 300 to the touch type faucet 302 by himself, the longdistance mode of the two-distance touch free automatic type water supplymethod of the present disclosure can provides a suitable quantity ofwater for washing the hand, but the hand needs to appear at the positionbeing far slightly from the outlet 316 all the time. The short distancemode of the two-distance touch free automatic type water supply methodof the present disclosure can continuously supply the water forproviding a great quantity of water, but the hand doesn't need to appearat the position being near slightly from the outlet 316 all the time.

FIG. 12 is a schematic plan view of a two-distance touch free automatictype water supply device 400 according to the fourth embodiment of thepresent disclosure. The two-distance touch free automatic type watersupply device 400 is installed to a wash basin. FIGS. 13 a and 13 b arepartially cross-sectional views of a shell of a two-distance touch freeautomatic type water supply device according to the fourth embodiment ofthe present disclosure. In this embodiment, the two-distance touch freeautomatic type water supply device 400 can be a touch free automatictype faucet for mixing cold water and hot water in an automatic/manualmode. Referring to FIGS. 12, 13 a and 13 b, the two-distance touch freeautomatic type water supply device 400 includes a shell 410, anelectronic control unit 430 and a driving unit 440. The electroniccontrol unit 430 includes a sensor 432 and a control circuit 434. Theshell 410 includes an inlet 412, two flow channels 414 a, 414 b and anoutlet 416, wherein the outlet 416 is communicated with the inlet 412through the flow channel 414 a or the flow channel 414 b. The inlet 412includes a cold water pipe 422 and a hot water pipe 424.

The two-distance touch free automatic type water supply device 400 inthe fourth embodiment is similar to the two-distance touch freeautomatic type water supply device 100 in the first embodiment, and thesimilar elements have been designated by similar reference numbers. Thedifference between the two-distance touch free automatic type watersupply devices 400, 100 in the fourth and first embodiments is that: thetwo-distance touch free automatic type water supply device 400 furtherincludes an automatic/manual mode cold/hot rotary switch 450 and a valvecore 460, as shown in FIGS. 13 a and 13 b. The automatic/manual modecold/hot rotary switch 450 is adapted to set whether the water supply ofthe outlet 416 is hot water, warm water or cold water in an automaticmode, the water supply of the outlet is hot water, warm water or coldwater in a manual mode, or the water supply of the outlet is in a stopmode. An end of the valve core 460 is physically connected to theautomatic/manual mode cold/hot rotary switch 450, and the other end ofthe valve core 460 is physically connected to the inlet 412 forcontrolling a mixture ratio of cold water to hot water of the inlet 412.

Referring to FIGS. 14, 13 a and 13 b, the valve core 460 includes acontrol rod 462 and a throttling plate 464. One end of the control rod462 is mechanically connected to the automatic/manual mode cold/hotrotary switch 450. The throttling plate 464 is physically connected tothe other end of the control rod 462, and includes two first and twosecond through apertures 466 a, 466 b, wherein the two first throughapertures 466 a or the two second through apertures 466 b arecorresponding to the cold water pipe 422 and the hot water pipe 424 ofthe inlet 412 respectively, whereby when the automatic/manual modecold/hot rotary switch 450 drives the control rod 462 and furtherrotates the throttling plate 464, an overlapping area between one of thetwo first through apertures 466 a and the cold water pipe 422 and anoverlapping area between the other one of the two first throughapertures 466 a and the hot water pipe 424 can be adjusted in theautomatic mode; or, an overlapping area between one of the two secondthrough apertures 466 b and the cold water pipe 422 and an overlappingarea between the other one of the two second through apertures 466 b andthe hot water pipe 424 can be adjusted in the manual mode. A lowerportion of the control rod 462 includes a chamber 467, which has a sideaperture 468. During the automatic mode, when the two through apertures466 a are overlapped with the cold water pipe 422 and the hot water pipe424 of the inlet 412 respectively, the side apertures 468 is overlappedwith the flow channel 414 a correspondingly, too, shown in FIG. 13 a. Atthe same time, the water flows through the inlet 412, the valve core460, the flow channel 414 a, the driving unit 440 and the outlet 416 inorder. Or, during the manual mode, when the two through apertures 466 bare overlapped with the cold water pipe 422 and the hot water pipe 424of the inlet 412 respectively, the side apertures 468 is overlapped withthe flow channel 414 b correspondingly, too, shown in FIG. 13 b. At thesame time, the water flows through the inlet 412, the valve core 460,the flow channel 414 b and the outlet 416 in order. Or, during the stopmode, when the two through apertures 466 a or the two through apertures466 b are not overlapped with the cold water pipe 422 and the hot waterpipe 424 of the inlet 412 respectively, the side apertures 468 is notoverlapped with the flow channel 414 a or the flow channel 414 bcorrespondingly, either (not shown).

When a user rotates a mark 452 of the automatic/manual mode cold/hotrotary switch 450 in a left direction (shown in FIG. 15 a), whereby thewater supply of the outlet 416 can be set to the hot water (H), the warmwater (W) or the cold water (C) in the automatic mode (A mode). Afterthe water supply of the outlet 416 can be set to the hot water (H), thewarm water (W) or the cold water (C), the long distance mode of thetwo-distance touch free automatic type water supply method of thepresent disclosure can provides a suitable quantity of hot water, warmwater or cold water for washing the hand, but the hand needs to appearat the position being far slightly from the outlet 416 all the time. Theshort distance mode of the two-distance touch free automatic type watersupply method of the present disclosure can continuously supply thewater for providing a great quantity of hot water, warm water or coldwater, but the hand doesn't need to appear at the position being nearslightly from the outlet 416 all the time.

When a user rotates a mark 452 of the automatic/manual mode cold/hotrotary switch 450 in a middle direction (shown in FIG. 15 b), wherebythe water supply of the outlet 416 can be set to in the stop mode (Smode).

When a user rotates a mark 452 of the automatic/manual mode cold/hotrotary switch 450 in a right direction (shown in FIG. 15 c), whereby thewater supply of the outlet 416 can be set to the hot water (H), the warmwater (W) or the cold water (C) in the manual mode (M mode).

The foregoing is considered as illustrative only of the implementationmanners or embodiments of the technical solutions adopted by the presentdisclosure to solve the problems and it's not desired to limit the scopeof the disclosure. Accordingly, all suitable modifications andequivalents may be resorted to, falling within the scope of thedisclosure.

What is claimed is:
 1. A two-distance touch free automatic type watersupply device, comprising: a shell comprising an inlet, a flow channeland an outlet, wherein the outlet is communicated with the inlet throughthe flow channel; an electronic control unit comprising: a sensoradjacent to the outlet for sensing an external object and thengenerating a sensing signal; and a control circuit electricallyconnected to the sensor and receiving the sensing signal for generatinga control signal; and a driving unit, wherein an end of the driving unitis disposed in the shell, and the other end of the driving unit isphysically connected to the flow channel for automatically controllingwhether water of the outlet is supplied according to the control signal;wherein: when the sensor senses an appearance of an external object at afirst distance from the sensor, the sensing signal is an open signal,whereby the water of the outlet is supplied; when the sensor senses adisappearance of the external object at the first distance from thesensor, the sensing signal is a closed signal, whereby the water of theoutlet is not supplied; when the sensor senses a first appearance and afirst disappearance of the external object at a second distance from thesensor, the sensing signal is an open signal, whereby the water of theoutlet is supplied, wherein the first distance is different from thesecond distance; and when the sensor senses a second appearance and asecond disappearance of the external object at the second distance fromthe sensor, the sensing signal is a closed signal, whereby the water ofthe outlet is not supplied.
 2. The two-distance touch free automatictype water supply device according to claim 1, wherein the firstdistance is set from 10 to 15 centimeters, and the second distance isset from 2 to 8 centimeters.
 3. The two-distance touch free automatictype water supply device according to claim 1, wherein the driving unitis a solenoid valve.
 4. The two-distance touch free automatic type watersupply device according to claim 1, further comprising: a cold/hotrotary switch adapted to set whether the water supply of the outlet ishot water, warm water or cold water; and a first valve core, wherein anend of the first valve core is physically connected to the cold/hotrotary switch, and the other end of the first valve core is physicallyconnected to the inlet for controlling a mixture ratio of cold water tohot water of the inlet.
 5. The two-distance touch free automatic typewater supply device according to claim 4, wherein the first valve corecomprises: a control rod mechanically connected to the cold/hot rotaryswitch; and a throttling plate physically connected to the control rod,and comprising two through apertures, which are corresponding to thecold water pipe and the hot water pipe of the inlet respectively,whereby when the cold/hot rotary switch drives the control rod andfurther rotates the throttling plate, an overlapping area between one ofthe two through apertures and the cold water pipe and an overlappingarea between the other one of the two through apertures and the hotwater pipe can be adjusted.
 6. The two-distance touch free automatictype water supply device according to claim 1, wherein the two-distancetouch free automatic type water supply device is a touch free automatictype faucet.
 7. The two-distance touch free automatic type water supplydevice according to claim 1, wherein the two-distance touch freeautomatic type water supply device is installed at a touch type faucet.8. The two-distance touch free automatic type water supply deviceaccording to claim 1, wherein the sensor is disposed onto the shell. 9.The two-distance touch free automatic type water supply device accordingto claim 1, wherein the sensor is disposed on the control circuit and isexposed out from the shell.
 10. The two-distance touch free automatictype water supply device according to claim 1, further comprising: anautomatic/manual mode cold/hot rotary switch adapted to set whether thewater supply of the outlet is hot water, warm water or cold water in anautomatic mode, the water supply of the outlet is hot water, warm wateror cold water in a manual mode, or the water supply of the outlet is ina stop mode; and a second valve core, wherein an end of the second valvecore is physically connected to the automatic/manual mode cold/hotrotary switch, and the other end of the second valve core is physicallyconnected to the inlet for controlling a mixture ratio of cold water tohot water of the inlet.
 11. The two-distance touch free automatic typewater supply device according to claim 10 wherein the second valve corecomprises: a control rod mechanically connected to the automatic/manualmode cold/hot rotary switch; and a throttling plate physically connectedto the control rod, and comprising two first and two second throughapertures, wherein: during the automatic mode the two first throughapertures are corresponding to the cold water pipe and the hot waterpipe of the inlet respectively, whereby when the automatic/manual modecold/hot rotary switch drives the control rod and further rotates thethrottling plate, an overlapping area between one of the two firstthrough apertures and the cold water pipe and an overlapping areabetween the other one of the two first through apertures and the hotwater pipe can be adjusted in the automatic mode; and during the manualmode the two second through apertures are corresponding to the coldwater pipe and the hot water pipe of the inlet respectively, wherebywhen the automatic/manual mode cold/hot rotary switch drives the controlrod and further rotates the throttling plate, an overlapping areabetween one of the two second through apertures and the cold water pipeand an overlapping area between the other one of the two second throughapertures and the hot water pipe can be adjusted in the manual mode. 12.A two-distance touch free automatic type water supply device,comprising: a shell comprising an inlet, a flow channel and an outlet,wherein the outlet is communicated with the inlet through the flowchannel; an electronic control unit comprising: an only sensor adjacentto the outlet for sensing an external object and then generating asensing signal; and a control circuit electrically connected to thesensor and receiving the sensing signal for generating a control signal;and a driving unit, wherein an end of the driving unit is disposed inthe shell, and the other end of the driving unit is physically connectedto the flow channel for automatically controlling whether water of theoutlet is supplied according to the control signal; wherein: when thesensor senses an appearance of an external object at a first distancefrom the sensor, the sensing signal is an open signal, whereby the waterof the outlet is supplied; when the sensor senses a disappearance of theexternal object at the first distance from the sensor, the sensingsignal is a closed signal, whereby the water of the outlet is notsupplied; when the sensor senses a first appearance and a firstdisappearance of the external object at a second distance from thesensor, the sensing signal is an open signal, whereby the water of theoutlet is supplied, wherein the first distance is different from thesecond distance; and when the sensor senses a second appearance and asecond disappearance of the external object at the second distance fromthe sensor, the sensing signal is a closed signal, whereby the water ofthe outlet is not supplied.
 13. The two-distance touch free automatictype water supply device according to claim 12, wherein the firstdistance is set from 10 to 15 centimeters, and the second distance isset from 2 to 8 centimeters.
 14. The two-distance touch free automatictype water supply device according to claim 12, wherein the driving unitis a solenoid valve.
 15. The two-distance touch free automatic typewater supply device according to claim 12, further comprising: acold/hot rotary switch adapted to set whether the water supply of theoutlet is hot water, warm water or cold water; and a valve core, whereinan end of the valve core is physically connected to the cold/hot rotaryswitch, and the other end of the valve core is physically connected tothe inlet for controlling a mixture ratio of cold water to hot water ofthe inlet.
 16. The two-distance touch free automatic type water supplydevice according to claim 15, wherein valve core comprises: a controlrod mechanically connected to the cold/hot rotary switch; and athrottling plate physically connected to the control rod, and comprisestwo through apertures, which are corresponding to the cold water pipeand the hot water pipe of the inlet respectively, whereby when thecold/hot rotary switch drives the control rod and further rotates thethrottling plate, an overlapping area between one of the two throughapertures and the cold water pipe and an overlapping area between theother one of the two through apertures and the hot water pipe can beadjusted.
 17. The two-distance touch free automatic type water supplydevice according to claim 12, wherein the two-distance touch freeautomatic type water supply device is a touch free automatic typefaucet.
 18. The two-distance touch free automatic type water supplydevice according to claim 12, wherein the two-distance touch freeautomatic type water supply device is installed at a touch type faucet.19. A two-distance touch free automatic type water supply method,comprising the following steps of: providing a sensor, wherein thesensor is adjacent to an outlet for sensing an external object and thengenerating a sensing signal; when the sensor senses an appearance of anexternal object at a first distance from the sensor, the sensing signalis an open signal, whereby the water of the outlet is supplied; when thesensor senses a disappearance of the external object at the firstdistance from the sensor, the sensing signal is a closed signal, wherebythe water of the outlet is not supplied; when the sensor senses a firstappearance and a first disappearance of the external object at a seconddistance from the sensor, the sensing signal is an open signal, wherebythe water of the outlet is supplied, wherein the first distance isdifferent from the second distance; and when the sensor senses a secondappearance and a second disappearance of the external object at thesecond distance from the sensor, the sensing signal is a closed signal,whereby the water of the outlet is not supplied.
 20. The two-distancetouch free automatic type water supply method according to claim 19,wherein the first distance is set from 10 to 15 centimeters, and thesecond distance is set from 2 to 8 centimeters.